Table 1.

Characteristics of subjects at baseline.

	Normal ECG	Any ECG abnormality	P value
	(N = 7963)	(N = 1548)
Males (%)a	50.8	63.0	<0.001
Age (years)b	42.8 ± 8.1	44.5 ± 8.6	<0.001
Current smoker (%)c	33.9	38.2	0.001
Diabetes (%)c	1.3	1.9	0.369
Cholesterol (mmol/l)c	6.46 ± 1.3	6.49 ± 1.3	0.695
BMI (kg/m2)c	25.8 ± 3.7	25.2 ± 3.6	0.001
Systolic blood pressure (mmHg)c	135 ± 19	144 ± 23	<0.001

^aAdjusted for age.

^bAdjusted for gender.

^cAdjusted for age and gender.